BOAG WEEK 1 LECTURE 1.docx

BOAG WEEK 1 LECTURE 1 (CH. 1, page 1-19): INTRODUCTION
TRAITS OF LIVING ORGANISMS:
1. Cells and Organization
-organisms maintain an internal order distinct from their environment
-simplest unit of life is a cell
1. Energy Use and Metabolism
-maintenance of organization requires E
-all living organisms must get E from the environ and use it to maintain internal
order
-chem rxns that break down nutrients: metabolism
-plants create own nutrients via photosynthesis
3. Response to Environmental Changes
-example of adaptation: processes and structures through which organisms
adjust to short/long-term changes in their environ
4. Regulation + Homeostasis
-regulation of their cellular processes and bodily f'ns to maintain relatively stable
internal conditions
-degree of maintenance varies from organism to organism
-all organisms continually regulate their cellular metabolism so nutrient molecules
are used @ an appropriate rate; new cell parts made when needed
5. Growth + Development
-growth: produces more/larger cells
-development: produces organisms w/ a defined set of characteristics
6. Reproduction
-all living organisms have a finite lifespan; they must reproduce
-all living organisms have DNA 7. Biological Evolution
-first 6 apply to individual organisms over a short time
-over a long time, the DNA of a living organism's kind can change over many
generations
-pop'ns change and adapt to their environ
atoms>molec